Valve lock



April 7-, 1936. R. 1.. LONG Q 2,036,763

I VALVE LOCK Filed Dec. 12, 1955 Baker? I. 0 7,

Patented Apr. 7, I936 UNITED. STATES PATENT OFFICE VALVE LOOK v Robert L. Long, Nor-wood, Ohio Application December 12, 1935, Serial No. 54,119

5 Claims.

This invention relates to a means whereby a fluid may be cut off between the source of supply and point of use, as a safety feature to prevent unauthorized use and more particularly to a means adapted to cut 01f the supply of gasoline or fuel at any point inthe fuel line of an automobile propelling engine.

It is particularly aimed to provide a valve construction adapted for incorporation at any desired location of such a fuel line, which is built to withstand tampering and of a construction which will require an individual key for operating means for each article built or installed, to avoid a possibility of operation of a number of the devices through the use of a master key or the like.

The more specific objects and advantages will become apparent from a consideration of the description following taken in connection with the accompanying drawing illustrating an operative embodiment.

In said drawing:--

Figure 1 is a view of the lock in side elevation;

igure 2 is a plan view thereof;

Figure 3 is a. central vertical sectional view;

Figure 4 is view similar to Figure 3, but showing valve in closed position;

Figm'e 5 is a cross sectional view taken on the line 5-5 of Figure 4;

Figure 6'is an elevation, partly broken away, of the operating key; and

Figure 7 is a detail side elevation of the valve means per se.

Referring specifically to the drawing, the device comprises, in one example, an L-s'haped fitting I0 having nipples at H and I2, with a passage l3 passing therethrough, so that one nipple constitutes an inlet, and the other constitutes an outlet. A valve casing M has a chamber IS in which a control header disc I8 is rotatable and slidable. Screw threaded in the lower wall of the casing l4, as at H, and into the control head, as at I8, is a valve stem l9. Valve. stem lahas a valve head at 20 normally adapted to remain retracted within a recess 2| communicating with passage".

In the assembling of the device, disc It is in serted into the chamber l5 while the stem I9 is applied on the lower or outer end of the casing l4,

- subsequent to which the stem is soldered to the plate It and the lower wall of casing l4 at'a neck suggested in Figure 6, and which is applicable through a slot 21 provided in the cover or cap 24.

' The upper end of the stem I9 and the upper surorder that the plate l8 and valve may be screwed to on and off position.

In addition, the plate I6 and lower wall of casing Il may have recesses or openings 3| and 32, 10 round, square, or otherwise in cross section, so that in the closed position of the valve a pin 33 of a cross section corresponding to that of said recesses 3| and 32 may be disposed therein. Such key has a screw threaded upper end 34 which is l5 engageable by the correspondingly threaded re-- sees 35 in one end of the key 28, and which is applicable through the slot 21 to engage or disengage such key 33.

Particular attention is called to the fact that 20 the inter-engaging projection of the key, stem l9 and plate It, as at the lower end of the key, at 30, 28 and 29, may be reversed and arranged at varying distances and locations, so that each structure manufactured according to the invention 25 will lave a different key, necessitating a different key for the operation thereof and thus guarding against such a construction or series of structures wherein a master key might be employed to operate them. It will also be borne in mind that 30 threads 34 may be of a diiferent number, diiferent pitch, and the like, to minimize the chances oi surreptitious operation of the pin 33.

In the use of the device it is obvious that it may be connected at any point desired in the fuel line Y end opposite to the chamber, said stem being secured to the plate, a valve head on said stem at the end opposite to the chamber, larger than the portion of the stem which is threaded to the casing, a fitting having an inlet and an outlet to which 50 the last-mentionedend of the casing is fastened, said valve head controlling the inlet and outlet.

2. A device of the class described, comprising a casing having a chamber, a plate slidable and rotatable in the chamber, a valve stem screw threaded to the casing and applicable from the end opposite to the chamber, said stem being secured to the plate, a valve head on said stem at the end opposite to the chamber, larger than the portion of the stem which is threaded to the casing, a fitting having an inlet and an outlet to which the last-mentioned end of the casing is fastened, said valve head controlling the inlet and outlet, and key-engageable means on said stern and said plate.

3. A device of the class described, comprising a casing having a chamber, a plate slidable and rotatable in the chamber, a valve stem screw threaded to the casing and applicable from the end opposite to the chamber, said stem being secured to the plate, a valve head on said stem at the end opposite to the chamber, a fitting having an inlet and an outlet to which the lastmentioned end of the casing is fastened, said valve head controlling the inlet and outlet, said plate and easing having registerable recesses in the closed condition of the valve, and a locking pin applicable to said recesses.

4. A device of the class described, comprising a casing having a chamber, a plate slidable and rotatable in the chamber, a valve stem screw threaded to the casing and applicable from the end opposite to the chamber, said stem being secured to the plate, a valve head on said stem at the end opposite to the chamber, a fitting having an inlet and an outlet to which the lastmentioned end of the casing is fastened, said valve head controlling the inlet and outlet, said plate and casing having registerable recesses in the closed condition of the valve, and a locking pin applicable to said recesses, said pin having screw threads engageable by a key for moving it longitudinally, and said stem and plate having means engageable by a key for rotating same.

5. A device of the class described, comprising a casing having a chamber, a plate slidable and rotatable in the chamber, a valve stem screw threaded to the casing and applicable from the end opposite to the chamber, said stem being secured to the plate, a valve head on said stem at the end opposite to the chamber, a fitting having an inlet and an outlet to which the last-mentioned end of the casing is fastened, said valve head controlling the inlet and outlet, said plate and casing having registerable recesses in the closed condition of the valve, and a locking pin applicable to said recesses, said pin having screw threads engageable by a key for moving it longitudinally, and said stem and plate having means engageable by a key for rotating same, and a cover for said casing having a slot therethrough enabling a key to engage said screw threads and said means.

ROBERT L. LONG. 

